HMS Vandal (Lt. John Stirling Bridger, RN) was sunk in Kilbrennan Sound, Loch Ranza, Clyde on 24 February 1943 while working up. On 22 February 1943 she left the depot ship HMS Forth, in Holy Loch, to carry out a three-day exercise in the Clyde area, which was to include a deep dive on the 24th. During the exercise the submarine was under no obligation to communicate with her base and no alarm was felt when she did not do so.

On 24 February 1943 HMS Vandal was observed leaving her anchorage just north of the Isle of Arran abuot 0830 hours. This was the last seen of her. The wreck was found in December 1994 and declared a War Grave in 1995.

25 Feb 1943HMS Usurper (Lt. D.R.O. Mott, DSC, RN) was conducting exercises on Inmarnock Water when she was ordered to search in the Clyde area for her missing sister ship HMS Vandal (Lt. J.S. Bridger, RN).